Center-punch, nail-set, &amp;c.



P. W. BACH() & P. E. DRAUGHON. CENTER PUNCH, NAIL sm, m. APPLICATION FILED JUNE 10, 1908.

925,978.` Patented June 22, 1909.

9 M 517 jf sTATEs PATENT OFFICE.

'.FRDEEICElNIL-LIAM BACHO AND PETER EDWARDS DRAUGHON, OF MOBILE, ALABAMA.

, nadamas. p

CENTER-PUNCH, NAIL-SET, 8&0.

' Toallwhom t may concern:

. Be .iti-known lthat we, FREDERICK WILLIAM BAoHo andPETEREDwARDs-DRAUGHON, citizens of the United States, residing at Mobile, in the county of Mobile and State of Alabama, have invented certain new and useful Improvements in Center-Punches, N ail-Sets,

te., of which the following is a specification.

This invention relates to impact tools, such as center-punches, nail-sets, chisels and the like that are operated by the blow or impact of 'a hammer, mallet or similar implement whilethe tool is being held with onehand by the operator. v `When a tool of this character is struck with a hammer, it is subjected to a concussion or jar which not only is extremely unpleasantto the operator, and apt to injure his hand when frequently repeated, but owing to which it is found extremely difficult to hold and to guide the tool properly so as to cause the blow to take eii'ect precisely vin the spot required. This is especially the case when a series of blows have to be delivered in quick succession, and when it is desired that two or more blows shall be delivered in the same spot.

The principal object of the present invention is to present a tool of this character whichshall be constructed in such a manner that it may be forcibly struck with a hammer, while being held with one hand by the operator, without causing any jar or concussion to the hand of the operator, who will thus be enabled to hold and to guide the'tool very conveniently and with great precision.

Further objects of the invention are to simplify and improve the construction and operation of this class of devices.

With these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement andcombination ofparts which will be hereinafter`fully described and particularly pointed out in the claim.

In the accompanying drawing has been illustrated a sim le and preferred form of the invention; it eing, however, understood that no limitation is necessarily made to the precise structural details therein exhibited,

-but that changes, alterations and modifica- Specification of Letters Patent.

Application filed June 10, 1908.

Patented .Tune 22, 1909.

serial No. 437,719.

Fig. 3 is a longitudinal sectional view showing a nail-set constructed in accordance with the invention. Fig. 4 is a side elevation, partly in section, showing a chisel constructed in accordance with the invention.

Corresponding parts in the several ligures are denoted by like characters of reference.

This invention is applicable to all kinds of tools that are operated by a blow or inipact of a hammer or mallet while being held by the operator, such as center-punches, nail and rivet sets, chisels, gougcs, washer cutters and the like, and it will be understood that such tools may be made of any desired sizes and dimensions.

The tool proper in each case consists of a shank or body 5,' provided at one end with a. cylindrical enlargement forming a strik- Ing head G, which is provided with a shoulder or offset 7 at the point where it joins the shank, said shank and head being preferably integral. The opposite or lower end of the shank is screw threaded as shown at 8, for the reception of the bit 9, which is provided with an internally threaded recess or socket l() for the reception of the threaded lower extremity of Athe shank. The bit 9 may be provided with a working point constituting the center unch, as shown at 11, in Fig. 2; said wor ring point may constitute a nail-set, as shown at'12 in Fig. 3; or`

it may be adapted or constructed to constitute a tool of any desired character as hereinbefore stated; thus, for instance, the bitl may be providedwith an edge forming a chisel, as shown at 13, in Fig. 4. The bit is.

clasped and held by the hand of the operator. -The tube 15 is of an interior diameter equal to the exterior diameter of the head 6, at the upper end of the shank 5; and said tube is provided at what is regarded at its lower end with an inturned or inwardly offset, flange or collar 1G, which is preferably of an internal diameter equal to the external diameter of the shank 5. It follows that when the shank 5 is placed within the' tubular handle the head or enlar ement 6 may be'guided 1n the body of the tu e, while the shank will project through and be guided in the flanged end of said tube, the ange 16 being engaged, or abutted upon, by the upper end of the bit, thus causing the parts, when properly assembled, to be held in the desired relation without wabbling, and enabling the shank to slide freely longitudinally within the tubular handle. A coiled spring 17 is placed upon the shank prior to the insertion of the latter into the tube; one end of said spring bearing against the shoulder `7` and the opposite end of the spring exerting tension against the annular. flange 16 of the tubular handle.

After adjusting the spring 17 upon the shank 5 and projecting the latter through the tube 15 `until the screw-threaded end of said shank projects beyond the flanged end of the tube,

' the bit 9 is adjusted upon the projecting screw-threaded end of the shank by placing the latter in engagement with the internally threaded recess or socket l0 of the bit; the

latter, as hereinbefore stated, forms an annular shoulder 14 abutting upon the flanged end of theV tubular handle, thus preventing the withdrawal of the shank, and properly assembling the parts ready for use.

The operation and advantages of this invention will be readily understood from the foregoing description when taken in connection with the. drawings hereto annexed. The tube o r sleeve constituting the handle of the device is graspedby the lingers of 'one hand and the tool is thus held while the working point or edge of the bit is ad.- justed in the desired position, and the head of the shank, which projects at the upper end of the handle is now struck a smart blow with' a hammer, the blow being repeated as often as may be desired. No

matter how forcible ablow is struck, the

blow will impact upon the shank of the tool only, and the handle, which is s lidably connected with the shank, and which is cushioned by the spring, will not be jarred in the least degree, thus enabling the operator to hold the tool firmly and tightly without danger ofv being shocked or jarred. To prevent slipping from the hand of the operator the surface of the handle is knurled or milled, as shown.

By connecting the bit detachably with the stem or shank 1n the manner described,the

parts of the improved tool may be readily and securely assembled without danger of.

Having thus described the invention what is claimed'is- A tool of the character described, comprising a tubular handle provided at one end with a inturned flange, a stem longitudinally slidable in" said tubular handle,

said stem comprising a portion of relativelyl small diameter terminally threaded and guided and extending through the flange at one endy of the tube and a portion of rela'- tively largediameter guided in and extending through the opposite end of the tube, a

spring coiled upon the stem and bearingatone end upon the shoulder formed by the enlarged portion of said stem and at the other end upon the inturned terminal liange of the tube; and a bitV having an internally threaded socket whereby it is detachably mounted upon the threaded end of the stem that projects through' the anged end of the tube; said bit abutting externally upon the flange in the tube. .Y

`In testimonywhereof we aiiix our signaV tures in presence of twov witnesses.

Witnesses:

F. C. WALLER,

HUBBARD PARKER. 

